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Income Taxes - Additional Information (Detail) - USD ($) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 01, 2018 | Dec. 22, 2017 | Dec. 21, 2017 | May 31, 2018 | May 31, 2017 | May 31, 2016
Income Tax [Line Items] |  |  |  |  |  |
Corporate income tax rate |  | 21.00% | 35.00% |  |  |
Corporate tax rate reduction effective date | Jan. 01, 2018 |  |  |  |  |
Percentage of blended rate | 29.20% |  |  |  |  |
Provisional income tax expense (benefit) |  |  |  | $ 7,300,000 |  |
Provisional income tax expense (benefit) related to provisional re-measurement of deferred tax assets and liabilities |  |  |  | (15,678,000) |  |
Provisional income tax benefit for the partial reversal of existing deferred tax liabilities |  |  |  | 44,900,000 |  |
Provisional charge for the transition tax on previously deferred foreign earnings |  |  |  | 67,899,000 |  |
Provisional deferred tax liability adjustment |  |  |  | 44,900,000 |  |
Foreign capital loss carryforwards |  |  |  | 21,500,000 |  |
Total Valuation Allowances |  |  |  | 51,540,000 | $ 63,686,000 |
Change in valuation allowances |  |  |  | 12,200,000 |  |
Reductions in valuation allowances related to planned utilization of capital loss carryforwards |  |  |  | 7,400,000 |  |
Reductions in valuation allowances related to impact of corporate tax rate reduction |  |  |  | 6,500,000 |  |
Unrecognized tax benefits that would impact effective tax rate, if recognized |  |  |  | 13,600,000 | 4,600,000 | $ 2,500,000
Accrued interest and penalties related to unrecognized tax benefits |  |  |  | 2,800,000 | 3,100,000 | $ 2,800,000
Unremitted foreign earnings |  |  |  | 549,800,000 | 324,100,000 |
Deferred income tax liability |  |  |  | 19,886,000 | $ 94,430,000 |
Benefit through income tax expense |  |  |  | 78,000,000 |  |
Deferred tax liability reduction charged to other comprehensive income |  |  |  | 3,500,000 |  |
Remaining unremitted foreign earnings |  |  |  | 1,100,000,000 |  |
Provision for deferred income taxes |  |  |  | 0 |  |
Capital Loss Carryforwards |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
U.S. tax credit carryforwards |  |  |  | $ 43,400,000 |  |
U.S. tax credit carryforwards expiration year end |  |  |  | 2022 |  |
State |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
U.S. tax credit carryforwards |  |  |  | $ 2,200,000 |  |
Net operating loss carryforwards |  |  |  | $ 2,200,000 |  |
Net operating loss carryforwards beginning expiration year |  |  |  | 2019 |  |
Foreign Net Operating Loss Carryforwards |  |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |  |
Net operating loss carryforwards |  |  |  | $ 166,500,000 |  |
Net operating loss carryforwards beginning expiration year |  |  |  | 2019 |  |
Net operating loss carryforwards subject to expiration |  |  |  | $ 25,500,000 |  |
Net operating loss carryforwards indefinite carry forward period |  |  |  | $ 141,000,000 |  |

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